CSEMP assessment of CB52 in sediment at inner (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 181.31 | 182.69 | -87.65 | 175.31 | |||
linear | 2 | 181.39 | 184.05 | -86.69 | 173.39 | 1.922 | 1 | 0.1656 |
smooth (df = 2) | 3 | 182.94 | 187.48 | -86.47 | 172.94 | 0.450 | 1 | 0.5021 |
smooth (df = 3) | 4 | 184.72 | 191.92 | -86.36 | 172.72 | 0.214 | 1 | 0.6438 |
smooth (df = 4) | 5 | 185.00 | 195.88 | -85.50 | 171.00 | 1.726 | 1 | 0.1889 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2018 | -0.5851 | -0.1921 | 0.3931 | 0.2784 | 1.412 | 0.1799 |
last 20 years | 1999 | 2018 | -0.5851 | -0.1921 | 0.3931 | 0.2784 | 1.412 | 0.1799 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.8252 | 0.1200 | -1.9282 | 0.1451 | -13.285 | 1.0000 |
EAC | 0.8252 | 2.7000 | 1.1853 | 0.1451 | 8.167 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for chlorobiphenyls in sediment
- Accessment criteria for chlorobiphenyls in sediment
Media : Sediment (unsieved)
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : CB52
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : CB52
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020